Liqun Cao, Ph.D., is Professor of sociology and criminology at Ontario Tech University, Canada. His research interests include criminological theory, gun ownership, police legitimacy, policy on ascetic deviance, and race and ethnicity in criminal justice. His research essays have appeared in many top national and international journals. He is the author of Major Criminological Theories: Concepts and Measurement (2004) and co-authors of Policing in Taiwan: From Authoritarianism to Democracy (2014) with LanYing Huang and Ivan Y. Sun. In addition, he co-edited book Lessons of International/Comparative Criminology/Criminal Justice with John Winterdyk (2004), and Handbook of Chinese Criminology (2014) with Ivan Y. Sun and Bill Hebenton.